Internal Metric Thread and Fastener Sizes M185 - M230

Internal Metric Thread Table Chart Fastener Sizes M185 - M230

ISO Metric Hardware Engineering Data
Fastener and Screw / Bolt Design, Formula and Calculations

The following table chart are standard metric internal thread sizes M185 - M230 per. ANSI/ASME B1.13M-1995. These thread sizes and classes represent bolts and screws, as well, as other standard internal threads. Do not use these values for standard metric external thread design. All units in mm.

Metric Internal and External threads

Where:

H = P ( 3^1/2 / 2 ) = 0.866025 P
or
0.125H = 0.108253P

ISO Metric Thread Designation	Pitch	Metric Internal Threads Specification Table
		Tolerance Class	Minor Dia		Pitch Dia		Major Dia		Tap Drill
		Tolerance Class	Min	Max	Min	Max	Min	Max	Basic
M185x6	6	6H	178.505	179.305	181.103	181.528	185.000	186.291	179.000
M185x4	4	6H	180.670	181.270	182.402	182.777	185.000	185.952	181.000
M185x3	3	6H	181.752	182.252	183.051	183.386	185.000	185.768	182.000
M185x2	2	6H	182.835	183.210	183.701	183.981	185.000	185.569	183.000
M190x8	8	6H	181.340	182.340	184.804	185.279	190.000	191.630	182.000
M190x6	6	6H	183.505	184.305	186.103	186.528	190.000	191.291	184.000
M190x4	4	6H	185.670	186.270	187.402	187.777	190.000	190.952	186.000
M190x3	3	6H	186.752	187.252	188.051	188.386	190.000	190.768	187.000
M190x2	2	6H	187.835	188.210	188.701	188.981	190.000	190.569	188.000
M195x6	6	6H	188.505	189.305	191.103	191.528	195.000	196.291	189.000
M195x4	4	6H	190.670	191.270	192.402	192.777	195.000	195.952	191.000
M195x3	3	6H	191.752	192.252	193.051	193.386	195.000	195.768	192.000
M195x2	2	6H	192.835	193.210	193.701	193.981	195.000	195.569	193.000
M200x8	8	6H	191.340	192.340	194.804	195.279	200.000	201.630	192.000
M200x6	6	6H	193.505	194.305	196.103	196.528	200.000	201.291	194.000
M200x4	4	6H	195.670	196.270	197.402	197.777	200.000	200.952	196.000
M200x3	3	6H	196.752	197.252	198.051	198.386	200.000	200.768	197.000
M200x2	2	6H	197.835	198.210	198.701	198.981	200.000	200.569	198.000
M205x6	6	6H	198.505	199.305	201.103	201.528	205.000	206.291	199.000
M205x4	4	6H	200.670	201.270	202.402	202.777	205.000	205.952	201.000
M205x3	3	6H	201.752	202.252	203.051	203.386	205.000	205.768	202.000
M205x2	2	6H	202.835	203.210	203.701	203.981	205.000	205.569	203.000
M210x8	8	6H	201.340	202.340	204.804	205.279	210.000	211.630	202.000
M210x6	6	6H	203.505	204.305	206.103	206.528	210.000	211.291	204.000
M210x4	4	6H	205.670	206.270	207.402	207.777	210.000	210.952	206.000
M210x3	3	6H	206.752	207.252	208.051	208.386	210.000	210.768	207.000
M210x2	2	6H	207.835	208.210	208.701	208.981	210.000	210.569	208.000
M215x6	6	6H	208.505	209.305	211.103	211.528	215.000	216.291	209.000
M215x4	4	6H	210.670	211.270	212.402	212.777	215.000	215.952	211.000
M215x3	3	6H	211.752	212.252	213.051	213.386	215.000	215.768	212.000
M220x8	8	6H	211.340	212.340	214.804	215.279	220.000	221.630	212.000
M220x6	6	6H	213.505	214.305	216.103	216.528	220.000	221.291	214.000
M220x4	4	6H	215.670	216.270	217.402	217.777	220.000	220.952	216.000
M220x3	3	6H	216.752	217.252	218.051	218.386	220.000	220.768	217.000
M220x2	2	6H	217.835	218.210	218.701	218.981	220.000	220.569	218.000
M225x6	6	6H	218.505	219.305	221.103	221.528	225.000	226.291	219.000
M225x4	4	6H	220.670	221.270	222.402	222.777	225.000	225.952	221.000
M225x3	3	6H	221.752	222.252	223.051	223.386	225.000	225.768	222.000
M225x2	2	6H	222.835	223.210	223.701	223.981	225.000	225.569	223.000
M230x6	6	6H	223.505	224.305	226.103	226.528	230.000	231.291	224.000
M230x4	4	6H	225.670	226.270	227.402	227.777	230.000	230.952	226.000
M230x3	3	6H	226.752	227.252	228.051	228.386	230.000	230.768	227.000
M230x2	2	6H	227.835	228.210	228.701	228.981	230.000	230.569	228.000

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